| 摘要 |
PROBLEM TO BE SOLVED: To facilitate, in a composition for resin using an inorganic compound having a sulfur atom and/or selenium atom, the operation of cast polymerization by reducing the viscosity of the composition for resin.SOLUTION: The composition for resin includes: (a) 1-50 pts.wt. of an inorganic compound having sulfur atom and/or selenium atom; (b) 50-99 pts.wt. of a compound represented by formula (1), (m is an integer of 0-4, and n is an integer of 0-2); and (c) 1-20 pts.wt. of a compound C having one or more disulfide bonds, which cannot be represented by formula (1). The compound (a) and the compound (b) are preliminarily subjected to prepolymerization for 1 minute to 72 hours at 0-150°C in the presence of imidazole as a preliminary reaction catalyst. |
